Expression of inflammatory cytokines and its correlation with peptide YY and claudin-1 in patients with irritable bowel syndrome / 中华消化杂志

Objective To explore the pathogenesis of irritable bowel syndrome (IBS) by detecting serum levels and the colonic mucosa expression of inflammatory cytokines,peptide YY (PYY),and claudin-1,and to analyze their correlation.Methods From April 2013 to April 2015,50 outpatients with IBS and 20 healthy controls were selected.Serum levels of PYY,interleukin (IL)-10,tumor necrosis factor (TNF)-α and claudin-1 were detected by enzyme-linked immunosorbent assay (ELISA).The expression of IL-10,TNF-α,PYY and claudin-1 in colonic mucosa was determined by immunohistochemistry.Single factor analysis of variance,least significant difference (LSD) method,chi-square test,and Pearson correlation analysis were performed for statistical analysis.Results Among the 50 patients with IBS,27 cases were diarrhea-type irritable bowel syndrome (D-IBS),and 23 cases were constipated-type irritable bowel syndrome (C-IBS).The serum level and the positive expression rate of PYY in colonic mucosa of D-IBS group were significantly higher than those of healthy control group ((16.28± 2.75) ng/L vs (10.12± 1.55) ng/L;66.7 ％ (18/27) vs 30.0 ％ (6/20)),and the differences were statistically significant (LSD-t=10.19,x2 =6.182,both P＜0.05).The serum level and the positive expression rate of IL-10 in colonic mucosa of D-IBS group were both significantly lower than those of healthy control group ((2.95 ±0.24) ng/L vs (3.58±0.35) ng/L;22.2％(6/27) vs 50.0％ (10/20)),and the differences were statistically significant (LSD-t =4.52,x2=3.948,both P＜0.05).The serum level and the positive expression rate of TNF-α in colonic mucosa of D-IBS group were both significantly higher than those of healthy control group ((8.73±0.41) ng/L vs (7.73±0.51) ng/L;66.7％(18/27) vs 30.0％(6/20)),and the differences were statistically significant (LSD-t=8.43,x2 =6.182,both P＜0.05).There was no statistically significant difference between C-IBS group and healthy control group in the serum levels of PYY ((10.24±1.34) ng/L vs (10.12± 1.55) ng/L),IL-10 ((3.43 ± 0.71) ng/L vs (3.58 ± 0.35) ng/L),TNF-α ((7.81±0.26) ng/L vs (7.73 ±0.51) ng/L),and thus the positive expression rate in colonic mucosa (39.1％(9/23) vs 30.0％(6/20),56.5％(13/23) vs 50.0％(10/20),34.8％ (8/23) vs 30.0％(6/20);all P＞0.05).The serum level of claudin-1 and its positive expression rate of PYY,IL-10,TNF-α in colonic mucosa in D-IBS group were both lower than those of healthy control group ((94.44 ± 6.61) ng/Lvs (103.64 ± 5.47) ng/L;11.1％ (3/27) vs 40.0％ (8/20)),and the differences were statistically significant (LSD-t=5.76,x2 =5.349;both P＜0.05).However,the serum level of claudin-1 and its positive expression rate in colonic mucosa in C-IBS group were both higher than those of healthy control group ((115.54±3.42) ng/L vs (103.64±5.47) ng/L;73.9％ (17/23) vs 40.0％(8/20)),and the differences were statistically significant (LSD-t=5.56,x2 =5.055;both P＜0.05).The serum levels of IL-10 and PYY,TNF-α and claudin-1 were negatively correlated in the D-IBS group (r=-0.874 and -0.863,both P＜0.05).While the serum levels of TNF-α and PYY,IL-10 and claudin-1 were positively correlated (r =0.865 and 0.876,both P＜ 0.05).Conclusions There may be the imbalance of proinflammatory factors and anti-inflammatory factors in IBS patients.PYY may decrease the expression of claudin-1 by promoting IL-10 and inhibiting TNF-α,and thus ameliorate the inflammation reaction of IBS patients.

Antibiotic-resistant genes and multilocus sequencing typing of Pseudomonas aeruginosa / 中国人兽共患病学报

We investigated the antibiotic‐resistant genes and genetic diversity of Pseudomonas aeruginosa from patients in hospital ,the smear samples from hospital and clinic environment ,and from medical staff’ hands respectively in 2011‐2012 in Nanshan District of Shenzhen .Polymerase chain reaction were used to detect the 20 kinds of antibiotic‐resistant genes (TEM , VEB,CARB,OXA,SHV,PER,GES,GTX,SPM,GIM,IMP,VIM,DHA,oprD,Aac(6′)‐Ⅰ ,Aac(6′)‐Ⅱ ,Aac (3′)‐Ⅰ ,A ac(2″)‐Ⅰ ,qacE1‐sull and int‐Ⅰ) .Multilocus sequencing typing was used to analyze the clonal complexes .The 11 kinds resistant genes TEM ,SHV ,IMP ,DHA ,Aac(6′)‐Ⅰ ,Aac(6′)‐Ⅱ ,Aac(3′)‐Ⅰ ,Aac(2″)‐Ⅰ ,qacE1‐sull ,int‐Ⅰand oprD were detected ,for the positive rates respectively ,and which were 8 .1% ,6 .4% ,4 .8% ,9 .7% ,4 .8% ,14 .5% ,9 .7% , 56 .5% ,8 .1% ,and 8 .1% ;the loss rate of oprD gene was 61 .2% .The 19 antibiotic resistance gene profiles existed in 52 Pseudomonas aeruginosa strains .Multilocus sequencing typing found 39 sequence types and 5 clonal complexes in 62 Pseudo‐monas aeruginosa strains ,CC244 and ST856 were dominant .There were some differences of antibiotic resistance gene profiles between different samples ,the Pseudomonas aeruginosa strains from patients carried multiple resistant genes .In our research , the Pseudomonas aeruginosa had the genetic diversity and the dominant clonal complexes existed .

Experimental Colitis Model Induced by DSS and TNBS in Rats:A Comparative Study / 胃肠病学

Background:As the empirical studies on human body are restricted extremely,the establishment and selection of suitable animal models are important for researches on ulcerative colitis( UC ). Aims:To compare the symptoms and colonic pathology of rat models with experimental colitis induced by dextran sulfate sodium( DSS ) and trinitrobenzene sulfonic acid( TNBS),so as to provide a reference for selecting animal models in UC-related studies. Methods:Drinking 4% DSS freely for 7 days or intrarectal administration of single dose 100 mg/kg TNBS-50% ethanol were used to establish experimental colitis model in Sprague-Dawley rats. The disease activity index( DAI)was assessed dynamically during the course of experiment. The whole colon was removed in batches for measurements of colonic damage score and activity of myeloperoxidase(MPO)at different time points. Results:The DAI score reached the peak at the 7th day and the 2nd day in DSS group and TNBS group,respectively,and decreased gradually afterwards. Six and one deaths occurred during the experimental course in DSS and TNBS groups,respectively. In DSS group,the duration of inflammation was short,the colonic injury was moderate and recovered after drug withdrawal. At the 18th day,the colonic damage score and MPO activity was 0. 25 ± 0. 50 and(0. 80 ± 0. 33)U/g,respectively,and no significant differences were seen between DSS group and normal control group. In TNBS group,the duration of inflammation was longer and the colonic injury was more severe. At the 21st day,the colonic damage score and MPO activity was 3. 60 ± 0. 55 and( 1. 60 ± 0. 39 ) U/g, respectively,and chronic inflammation was observed histologically. Conclusions:Both DSS and TNBS can induce experimental colitis model in rats. The course of TNBS-induced colitis model presents a transformation of acute to chronic inflammation,and may be more suitable for treatment-related studies of UC.

Epidemiological investigation of fatty liver disease in Northwest China / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To describe the incidence and related risk factors of fatty liver disease in the general population of Northwest China.</p><p><b>METHODS</b>The study was a cross-sectional survey with multiplestage stratified cluster and random sampling. All participants were 18 years or older and resided in northwest provinces of China.Demographic and behavioral data was gathered by questionnaire.Clinical data such as height, body weight, waist circumference, biochemical function (standard tests) and liver status (ultrasonographic examination) were also collected.</p><p><b>RESULTS</b>Among the 2 300 total study participants, 1 523 were habitual drinkers (total drinking rate: 66.2%). This population of drinkers was composed almost exclusively of males. There were 201 cases of alcoholic liver disease (total prevalence:8.7%), represented by mild alcoholic injury (prevalence: 4.2%), alcoholic fatty liver (3.8%), alcoholic hepatitis (0.5%), and alcoholic cirrhosis (0.3%).When examined according to provinces of residence, the prevalence of alcoholic liver disease followed this pattern: Shaanxi (14.0%), Gansu (8.6%), and Xinjiang autonomous region (5.0%). Of the total 337 cases of nonalcoholic fatty liver disease (total prevalence: 14.7%), the prevalence by province was: Shaanxi (18.5%), Gansu (10.3%), and Xinjiang autonomous region (16.6%). Individuals with alcoholic liver disease had significantly higher mean age (years), body weight, body mass index (BMI), waist circumference, average daily alcohol intake, and level of aspartate aminotransferase (AST), and alanine aminotraasferase (ALT) (vs. Those with no liver disease, P less than 0.05). Individuals with nonalcoholic fatty liver disease had significantly higher mean age (years), height, body weight, BMI, waist circumference, level of AST and ALT, and presence of obesity, abdominal obesity, hyperlipidemia, diabetes mellitus and hypertension (vs. Those with no liver disease, P less than 0.05). Multiple logistic regression demonstrated that alcoholic liver disease was closely related to age, sex, and average daily alcohol intake. The prevalence of nonalcoholic fatty liver disease was positively correlated to age, female sex, hyperlipidemia, diabetes mellitus, and BMI.</p><p><b>CONCLUSION</b>The drinking-rate and prevalence of fatty liver disease is high in Northwest China, but the most prevalent type is nonalcoholic fatty liver disease.Fatty liver disease is closely related to age, sex, average daily alcohol intake, hyperlipidemia, diabetes mellitus, and BMI.</p>

Genetic characterization of Vibrio parahaemolyticus O3: K6 serovariant isolated in Shenzhen / 中华预防医学杂志

<p><b>OBJECTIVE</b>To characterize the O3: K6 serovariant of Vibrio parahaemolyticus on virulence gene and molecular typing, and analyze the genetic relationship between O3: K6 and O3: K6 serovariants.</p><p><b>METHODS</b>PFGE was performed on 115 strains of V.parahaemolyticus which were collected from the anal swab of cases of foodbrone diseases in Shenzhen during 2006-2012. According to isolation times and locations, 7 strains of O3: K6 were selected as control strains. Tdh gene, trh gene, orf8 gene were detected, GS-PCR, multi-locus sequence typing (MLST) were used to chracterize 7 strains of O3: K6 and O3: K6 serovariants.</p><p><b>RESULTS</b>PFGE indicated that 58.3% (67/115) of V. parahaemolyticus strains shared a high similarity of band pattern (similarity > 80%) , which comprised of O3: K6 (44/67), O1: KUT(4/67), and O3: K6 serovariants(19/67). Among the O3: K6 serovariants, O1: K25 accounted for 7% (5/67), O4: K68 accounted for 10% (7 /67), O11: K36 accounted for 10% (7 /67). They all carried both tdh and trh gene, and 53% (10/19) was GS-PCR positive and carried orf8 gene, 26% (5/19) was both GS-PCR and orf8 gene negative, 21% (4/19) was GS-PCR negative, orf8 gene positive, 89% (17/19) was assigned to ST-3, 11% (2/19) was assigned to ST-305. Seven strains of O3: K6 was GS-PCR positive, carried orf8 gene, assigned to ST-3. ST-305 and ST-3 had differences in 2 housekeeping genes, which was dtdS gene and pntA gene. In the 305th base of dtdS gene, ST-305(147 allele profile) was T, while ST-3(4 allele profile) was C. In the 33th base of pntA gene, ST-305(93 allele profile) was T, while ST-3(29 allele profile ) was C.</p><p><b>CONCLUSION</b>O4: K68,O1: K25 and O11: K36 were highly similar in virulencec gene carriage, MLST type of O3: K6, and aslo shared a close genetic relationship with O3: K6, thus were considered as O3: K6 serovirants.</p>

Normative values and its clinical significance of the anorectal manometry in Chinese from multi-center study / 中华消化杂志

Objective To acquire normative values of anorectal manometry and sensation in population of our country with different gender and age.Methods Healthy individuals from four medical centers were collected and divided into three group according to their age,group Ⅰ 18 - 39 years old, group Ⅱ 40-59 years old and group Ⅲ ≥60 years old.The parameters of anal of subjects at resting status was examined by pneumohydraulic capillary perfusion system and high resolution PC Polygraf HR desktop gastrointestinal dynamic monitoring system.Subjects were asked to simulate defecation and then the defecation related indexes were recorded.In the end rectoanal inhibitory reflexes (RAIR)and rectal sensation were assessed by aired balloon.One-way analysis of variance and independent sample test were performed to compare indexes among three groups with different age and between different genders. Results A total of 166 healthy subjects were enrolled,79 in group Ⅰ with 40 male,68 in group Ⅱ with 29 male and 19 in group Ⅲ with 11 male.There was no significant difference in anal sphincter length (ASL),valid anal sphincter length (VASL),resting anal sphincter pressure (RASP),squeeze anal sphincter pressure (SASP)and duration of valid squeeze anal sphincter pressure (VSASP)among three groups with different age (all P > 0.05 ).Compared between male and female,only SASP of male ((180.13±8.10)mmHg,1 mmHg=0.133 kPa)was significantly higher than that of female ((143.93± 6.59)mmHg,t = -3.489,P 0.05 ). There was no significant difference in rectal pressure (RP),rectoanal pressure gradient (RAPG),anal sphincter relaxation rate (ASRR),and rectoanal coordination (RAC)among three groups (all P >0.05). During simulated defecation,RP and RAPG of men ((61 .23±3.46)mmHg and (40.04±4.08)mmHg) were significantly higher than those of women ((44.47 ± 2.32)mmHg and (24.00 ± 2.59 )mmHg, t=-4.075 ,-3.367,both P 0.05).All participants had RAIR,and there was no significant difference neither among three groups nor between men and women (both P >0.05).There was no significant difference in first rectal sensation (FRS)and constant rectal sensation (CRS)among three groups with different age (all P >0.05).However,the maximum rectal tolerable sensation (MRTS)of group Ⅱ and group Ⅲ was significantly higher than that of group Ⅰ ((194.41 ±6.32)mL and (200.00±12.75)mL vs (167.80 ± 5 .00)mL,F = 6.698,P = 0.002).There was no significant difference in rectal sensation between different gender (all P >0.05 ).Conclusions In our country,SASP,RP and RAPG during simulated defecation of male are higher than those of female.The value of MRTS increases along with the age.

Normative values of the esophageal manometry and its influential factors in the healthy subjects: a multiple center study in China / 中华消化杂志

ObjectiveTo establish normative values of esophageal manometry in different age groups and standard test method.Methods The values of esophageal manometry were tested in healthy subjects of 3 different age groups (Group Ⅰ: 18-39 years,Group Ⅱ: 40-59 years,Group Ⅲ:≥60 years) with pneumohydraulic capillary perfusion system.The repeatability and stability of this method in lower esophageal sphincter (LES) testing were observed. Results There were no significant differences of LES length (LESL),LES pressure (LESP) at the end of expiration,average LESP,residual pressure of LES and LES relaxation rate (LESRR) in three groups (P＞0.05).The LESP at the end of inspiration in Group Ⅰ (28.98± 1.11 ) mm Hg was significantly lower than that of Group Ⅲ (34.35±1.96) mm Hg (P＜0.05).Trandiaphragmatic pressure (Pdi) in Group Ⅰ (9.55±0.62) mm Hg was significantly lower than that of Group Ⅱ (13.05±0.76) mm Hg (P＜0.05).There were no significant differences in contraction amplitude and duration of proximal and distant esophagus in 3 groups (P＞0.05).UES pressure (UESP) of Group Ⅲ was significantly lower than that of Group Ⅰ and Ⅱ (P＜0.05).As for repeatability,the second recording of LESP in Group Ⅰ and Ⅱ were significantly higher than first recording (P＜0.05).Amplitude of distant esophageal peristaltic contraction (DEPC) of female was significantly higher than of male (P＜0.05).However,there was no significant difference in amplitude of proximal esophageal peristaltic contraction (PEPC)between femal and male (P＞0.05).ConclusionsThe normative values of esophageal manometry in different age groups have been obtained.The dynamic parameters of LES do not change with age.Between age 40 to 59 years old,the contraction of esophageal body is strongest.UESP decreases significantly in old people.If the subjects have enough time to adapt before test,it will help to get accurate and reliable dynamic parameters of LES.

Genetic polymorphism of cytochrome P450 2C19 in Xinjiang Uigur population versus Han population / 中国组织工程研究

BACKGROUND: Previous studies demonstrated that,metabolic phenotype of cytochrome P450 2C19 has genetic polymorphism,which presents with extensive or poor metabolisms and has great differences in races and individuals.OBJECTIVE: To study the genotype distribution of cytochrome P450 2C19 in Xinjiang Uigur population.METHODS: In total 144 unrelated Uigur and 156 unrelated Han subjects were genotyped for cytochrome P450 2C19 by polymerase chain reaction-restriction fragment length polymorphism.The differences of gene phenotype and gene frequency were compared between Uigur and Han populations.RESULTS AND CONCLUSION: The frequency of extensive metabolism wt/wt,wt/m and wt/m1+wt/m2 of Uigur was notably higher than that of Han population(P<0.05),but the frequency of poor metabolism m1/m1 was obviously lower than that of Han population(P<0.05).There were significant differences between Uigur and Han populations in allele frequency wt,m1 and m2(P<0.05),especially m1,which was 58-fold of m2(P<0.01).The results revealed that,distribution frequency m1/m1 of poor metabolism of Uigur is obviously lower than that in Han population,and m1 frequency is higher than that of Han population,accordingly,m1 is the main gene mutation of cytochrome P450 2C19 in Uigur population.

Characterization of M2 gene of H3N2 subtype swine influenza virus / 生物工程学报

M2 protein of influenza A virus is encoded by a spliced mRNA derived from RNA segment 7 and plays an important role in influenza virus replication. It is also a target molecule of anti-virus drugs. We extracted the viral genome RNAs from MDCK cells infected with swine influenza A virus (SIV) H3N2 subtype and amplified the SIV M2 gene by reverse transcriptase-polymerase chain reaction using the isloated viral genome RNAs as template. The amplified cDNA was cloned into a prokaryotic expression vector pET-28a(+) (designated pET-28a(+)-M2) and a eukaryotic expression vector p3xFLAG-CMV-7.1 (designated p3xFLAG-CMV-7.1-M2), respectively. The resulted constructs were confirmed by restriction enzyme digestion and DNA sequencing analysis. We then transformed the plasmid pET-28a(+)-M2 into Escherichia coli BL21 (DE3) strain and expressed it by adding 1 mmol/L of IPTG (isopropyl-beta-D-thiogalactopyranoside). The recombinant M2 protein was purified from the induced bacterial cells using Ni(2+) affinity chromatography. Wistar rats were immunized with the purified M2 protein for producing polyclonal antibodies specific for it. Western blotting analysis and immunofluorescence analysis showed that the produced antibodies were capable of reacting with M2 protein expressed in p3xFLAG-CMV-7.1-M2-transfected cells as well as that synthesized in SIV-infected cells. We also transfected plasmid p3xFLAG-CMV-7.1-M2 into Vero cells and analyzed its subcellular localization by immunofluorescence. The M2 protein expressed in the Vero cells was 20 kDa in size and dominantly localized in the cytoplasm, showing a similar distribution to that in SIV-infected cells. Western blotting analysis of SIV-infected cells suggested that M2 was a late phase protein, which was detectable 12 h post-infection, later than NS1, NP and M1 proteins. It would be a potential molecular indicator of late phases replication of virus. Our results would be useful for studying the biological function of M2 protein in SIV replication.

A research of migrating motor complex in patients with irritable bowel syndrome / 中华内科杂志

Objectives To compare the migrating motor complex (MMC) in irritable bowel syndrome (IBS) patients with that in healthy controls. To explore whether discrete clustered contractions (DCC) are connected with abdominal pain in IBS patients. To improve the method of measuring gastroenteric motility (esp. jejunum). Methods By using 16-channel water-perfused catheter and manometry instruments, MMC in 16 cases of IBS with constipation (IBS-C), 18 cases of IBS with diarrhea (IBS-D) and 18 cases of healthy controls were monitored. Results The MMC durations of IBS-C and IBS-D patients were (127.5±25.5) min and (74.5±18.7) min, respectively. Comparision with those in the control group [(87.5±24.2) min]showed significant differences (P<0. 001). The contraction amplitudes of stage Ⅲ in different sites of IBS-C patients decreased significantly as compared with those in the controls [jejunum, (39.8±11.7) mm Hg vs. (61.1±14.1) mm Hg,P<0.001,1 mm Hg=0.133 kPa]. The propagation velocities of stage Ⅲ in different sites of IBS-C patients also decreased significantly as compared with those in the controls [jejunum, (1.8±0.9) cm/min vs. (2.6±0.8) cm/min,P<0.01].The contraction amplitudes of stage Ⅲ in different sites of IBS-D patients increased significantly as compared with those in the controls [jejunum, (69.7±20.5) mm Hg vs. (61.1±14.1) mm Hg, P<0.01]. The propagation velocities of stage Ⅲ in different sites of IBS-D patients also increased significantly as compared with those in the controls [jejunum, (4.1±2.5) cm/min vs. (2.6±0.8) cm/min, P < 0. 01]. DCC incidences of IBS-C and IBS-D were 87.5% and 88. 8%, respectively. Comperision with those in the normal group (83.3%) did not show significant difference (P>0.05). The prevalences of abnormal stage Ⅲ contractions (include disturbances and interferences of stage Ⅲ contractions) in IBS-C and IBS-D patients were 68.8% and 66. 7%, respectively; there were no significant differences between the two groups (P > 0. 05). However abnormal stage Ⅲ contractions did not exist in healthy controls. Conclusions (1) The MMC of IBS-C and IBS-D patients are changed, as compared with that in healthy people; this implies that small intestinal motility dysfunction is one of the pathogenetic factors of IBS. The abnormal stage Ⅲ contractions in jejunum may be a predominant change in IBS gastroenteric motility. (2) No apparent connection is found between DCC and pain in IBS. (3) By using 16-channel water-perfused catheter, we first carried out the method of monitoring jejunum contractions in China. Parameters of MMC in Chinese healthy people were investigated, esp. those of jejunum.

Relationship between the acid-suppression efficacy of proton pump inhibitors and CYP2C19 genetic polymorphism in patients with peptic ulcer / 药物分析学报

Obiective To investigate acid-suppression efficacy of proton pump inhibitors(PPls) in relation to CYP2C19 genetic polymorphism on patients with peptic ulcer. Methods By an open, randomized and control trial, fifty nine patients with active peptic ulcer were randomly assigned to receive one of three PPIs on a single dose (20 mg of each drug): omeprazole group (n=19), rabeprazole group (n=20) and esomeprazole group (n=20). lntragastric pH was recorded 1 hour before and 24 hours after administration. CYP2C19 genotype was tested in all patients. Resuits The EMs/PMs ratio of each group was 16/3,17/3 and 17/3, respectively. The total time that intragastric pH＞4, time percent pH＞4 and median pH in PMs patients were significantly higher than those in EMs patients of omeprazole group (P＜0.05). But all these differences were not found in rabeprazole group and esomeprazole group. The pH of nocturnal acid breakthrough (NAB) in both rabeprazole group and esomeprazole group was higher than that of omeprazole group, while there was no significant difference between rabeprazole group and esomeprazole group. Gonclusion The acid-suppression efficacy of omeprazole is highly dependent on CYP2C19 genetic polymorphism, while CYP2C19 genetic polymorphism may have a little influence on the acid-suppression efficacy of rabeprazole and esomeprazole. The acid-suppression action of rabeprazole and esomeprazole is superior to omeprazole, especially on night acid secretion.

Progress in building animal model of irritable bowel syndrome / 基础医学与临床

Irritable Bowel Syndrome(IBS) is a common disease of intestinal disorder.It is characterized by chronic or recurrent abdominal pain or discomfort along with altered bowel function.The underlying mechanisms of IBS remain unclear.Several studies showed that the attack of IBS might be related to the gastrointestinal motility,visceral hypersensitivity,infection of the bowel and several other factors.Existing animal models can be divided into 2 broad categories based on their primary pathogenetic mechanisms: those initiated by a central nervous system-directed(psychosocial) stressor and those stems from a gut-directed stressor(gut inflammation,infection).This article reviews the current research of IBS animal model.

Effects of tegaserod on visceral sensitivity and expression of SP and CGRP in the rat colon / 西安交通大学学报(医学版)

Objective To investigate the effects of tegaserod on visceral sensitivity and explore the regulating mechanism.Methods Forty-two male Spragre-Dawley rats,which were induced colonic inflammation by intraluminal administration of trinitrobenzenesulfonic acid(TNBS),were randomly divided into eight groups.In the three colorectal distention(CRD) treated groups(n=6),abdominal contractions were recorded after 3,7 and 14 days of intra-gastric administration of tegaserod 2mg/kg d.In the three CRD control groups(n=4),abdominal contractions were recorded after 3,7 and 14 days of intra-gastric injection of saline 2.0mL/d.In immunohistochemistry(IH) treated group(n=6) and IH control group(n=6),samples of colon were removed and processed for SP and CGRP immunohistochemistry after 7 days of intra-gastric administration of tegaserod and saline,respectively.Results Abdominal contractions induced by colonic distention decreased significantly at 1.2mL and 1.6mL distention volume after 3 days of tegaserod administration(P

The acid-suppressing effects of esomeprazole between extensive metabollizers and poor metabolizers in relation to CYP2C19 genetic polymorphism / 西安交通大学学报(医学版)

0.05). Conclusion We di d not find the difference between the two CYP2C19 phenotypes in relation to the acid-suppressing effect of esomeprazole.

The effects of infrasound on gastric emptying / 中华物理医学与康复杂志

Objective To explore the effects of infrasound frequency and intensity on gastric emptying in rats. Methods One hundred and forty rats were randomly divided into a control group, and groups receiving 8 Hz-90 dB, 8 Hz-130 dB and 16 Hz-130 dB infrasound. Another 70 rats were randomly divided into a control group and an exposure group continuously stimulated with infrasound at 8 Hz and 130 dB. The control group again was not exposed. The gastric emptying rate of the rats in all the groups was tested at different time points. Results ①Compared with the control group, gastric emptying rate decreased significantly after exposure to infrasound for 7 or 14 days. After exposure for 1 day, no significant difference was found. After exposure for 7 , 14, 21 or 28 days, gastric emptying decreased significantly more in the 8 Hz-130 dB group than in the 8 Hz-90 dB group or the control group. ②Compared with the controls, gastric emptying decreased in the 16 Hz-130 dB group after exposure for 1 , 7 and 14 days, but there was no significant difference between these two groups after 21 or 28 days. Gastric emptying decreased significantly more at 8 Hz-130 dB than at 16 Hz-130 dB after exposure for 14 or 28 days.③Gastric emptying tended to recover after exposure of 14 days to 8 Hz-130 dB infrasound, but compared with the controls, gastric emptying was still reduced after exposure had been stopped for 1 , 7 , 14, 21 and 28 days. Conclusion Infrasound at 8 Hz-90 dB, 8 Hz-130 dB or 16 Hz-130 dB can restrain stomach emptying. The extent of the reduction is closely related to the frequency, intensity and exposure time. Gastric emptying tends to recover after infra-sound exposure is stopped.

Effect of different infusion volume on hemodynamics of portal hypertension canines after hemorrhagic shock / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To examine the effect of different infusion volume on hemodynamics of portal hypertension (PHT) canines after hemorrhagic shock (HS).</p><p><b>METHODS</b>PHT canine models were made by coarctating a half main portal vein with silk line chronic embolization. Two weeks later, the canine models were assigned to hemorrhagic shock by femoral artery venesection quickly. They were divided into two groups: large volume infusion group (n=6) and small volume infusion group (n=6). Hemodynamics indexes of PHT canines after HS were monitored continuously. We also examined the effect of different infusion volume on hemodynamics.</p><p><b>RESULTS</b>PHT canines showed a series of hemodynamics changes in hemorrhagic shock stage, which aggravated hemodynamics disorder in PHT. After quick infusion, MAP, IVCP, PVP, PVPG, PVBF, HABF, and HBF increased significantly. These indexes in large volume infusion group were higher than those in small volume infusion group. PVR, SVR, HAR decreased significantly. PVP, PVPG, PVBF, HABF, and HBF showed a rebound increase above baseline values in large volume infusion group. The changes of PVP, PVPG, PVBF, HABF, and HBF were parallel with MAP and IVCP and without rebound increase in small volume infusion group. In large volume infusion group PVPG increased earlier and more significant than PVP and exceeded baseline by 13% (2.58 0.37) kPa, so the danger of rebleeding rose greatly. In small volume infusion group PVPG was over 22% (1.67 0.27) kPa lower than baseline, which infers that the danger of rebleeding reduced greatly. SVR and HAR were lower in large volume infusion group. PVP, PVPG, PVBF, HABF, and HBF showed a positive correlation with accumulated vein infusion volume. PVR showed a positive correlation with accumulated vein infusion volume in small volume infusion group. HAR showed a negative correlation with accumulated vein infusion volume in large volume infusion group.</p><p><b>CONCLUSIONS</b>PHT canines after HS show a rebound increase of PVP, PVPG, PVBF, HABF, and HBF above baseline values in large volume infusion group. In small volume infusion group, however, no rebound increase is noticed. Large volume infusion may cause PVP, PVPG, PVBF, HABF, and HBF increase higher than small volume infusion.</p>

STUDY ON GASTROINTESTINAL MOTILITY IN SLOW TRANSIT CONSTIPATION / 药物分析学报

Objective To investigate motor activity of gastrointestinal tract in patients with slow transit constipation(STC). Methods 42 patients with STC and 20 healthy controls were included in the study. Each subject underwent colonic transit test, gastric emptying, orocecal transit time, electromyography and anorectal manometry. Results According to transit index, 42 STC patients were divided into 3 types: ①0.5<TI≤1.0, slow rectosigmoid transit 15 cases; ②TI=0.5, colorectal stasis 10 cases; ③0<TI≤0.5, slow colonic transit 17 cases. Gastric emptying rate at the fourth hour was decreased in STC patients than in controls (P<0.05). The mean orocaecal transit time was significantly delayed in the patients (P<0.05). Paradoxical anal sphincter contraction with defecation effort was higher prevalent in patients with slow rectosigmoid transit and colorectal stasis than patients with slow colonic transit(P<0.01,respectively). Minimum relaxation volume and maximal rectal tolerable volume were significantly increased in STC patients (P<0.05,respectively). Conclusion STC displayed colonic abnormality, and/or pelvic floor dysfunction. In addition, it showed motor abnormalities of upper gut, might be part of a pan-enteric motor disorders.

Barrett’ s esophagus: clinical study / 中华消化内镜杂志

0.05), but the frequency and intensity of macroscopic esophagitis of BE were significantly milder than those of RE (P0.05) except that a higher intragastric pressure was recorded in patients with BE. Conclusion The esophageal motor dysfunction is unlikely the main factor in the genesis of BE .

Fos expression in rat lumbarsacral spinal cord and medulla oblongata induced by chronic colonic inflammation / 中华消化杂志

Objective The aim of this study was to investigate Fos expression in rat lumbarsacral spinal cord and medulla oblongata induced by chronic colonic inflammation. Methods Twenty six male Sprague Dawley rats were divided into three groups: group 1, colonic inflammation was induced in sixteen rats by intraluminal instillation of trinitrobenzenesulfonic acid (TNBS); group 2, saline was instilled intraluminally in eight rats; group 3, no stimulation was given in 2 rats. After 3, 7, 14 and 28 days of instillation, lumbarsacral spinal cord and medulla oblongata were removed and processed for Fos immunohistochemical staining. Results Fos neurons induced by TNBS instillation were mainly distributed in deep laminae (laminae Ⅲ Ⅳ,Ⅴ Ⅵ) in spinal dorsal horn and in medullary visceral zone in medulla oblongata. The number of Fos cells in the spinal cord and medullary visceral zone was significantly higher in rats after 7 and 14 day of TNBS instillation compared with that of controls. After 28 days of TNBS instillation, the number of Fos neurons in the medullary visceral zone decreased and became comparable to that of control group. However, the number of Fos cells (54.1?16.3) in the spinal cord in some rats was still significantly higher than that of controls (12.2 ?2.6, P

Clinical analysis of 2623 dyspepsia patients / 中华消化杂志

Objective To improve the capability identifying the causes of dyspepsia. Methods Standardized questionnaires were used to investigate the 2623 dyspeptic outpatients among four hospitals in Guan-zhong area, Shaanxi Province. All of the patients were followed up for 4-24 weeks, and finally diagnosed according to consistent criteria. Results The frequency rate of functional dyspepsia (FD) was 50.5%, benign organic causes were present in 39.3% and malignant diseases accounted for the remaining 10.2%. In the patients who had marked alarm symptoms, the proportion of benign organic causes and malignant diseases rose to 48.3% and 29.8% respectively, significantly higher than that without alarm symptoms (33.9% and 2.7% respectively)(P